Just so you know, I’m not recommending this as a solution 
Now that Twitter has gone mainstream there are people left, right and center finding ways to use it. Finding people to follow. Looking for ways for people to follow them. A common trend now is monitoring keywords. So, people interested in SEO might monitor people who are tweeting about ‘search engine optimisation’ or ‘SEO’.
Tracking keywords on Twitter is fast becoming the norm. I personally track a handful of keywords for myself (e.g. rosiesherry). What people are now doing is finding people based on keywords and following them as a result.
So, this is generally ok if there is a genuine interest, but gets slightly annoying when innocent tweets including words such as ‘weight loss’, ‘diet’, ‘loans’ (etc) leads to a flurry of new spammy followers.
It might make you seem more popular, but as someone who has been on Twitter for 2+ years it makes me feel sad that Twitter has now gone mainstream.